Modeling The Kinetics of Adsorption of Ni (II) Ion With Wasted Orange Peel

In recent years, researchers prefer to use biomaterials as sorbents in adsorption studies. Orange is a fruit abundantly found in the Mediterranean Basin. In this study, waste orange peel (WOP) was used as an adsorbent because it is cheap and harmless to nature. Nickel is a heavy metal widely used in industry. In parallel with its natural use, it pollutes the environment and harms many living things, especially humans. In this study, the adsorption kinetics of WOP, which is evaluated for the removal of Ni (II) ions from aqueous solutions, was investigated. The aim is to reveal which kinetic model the adsorption is suitable for and whether the adsorption is physical or chemical. Previously, the structure of the adsorbent was elucidated by SEM-EDX, FTIR analysis. The data obtained from the kinetic study carried out at 3 temperatures, 298, 308 and 318 K, were applied to the 3 linear types (types 6, 7 and 8) of the Pseudo-Second Order (PSO) kinetic model, which are the most compatible with the experimental data, namely Pseudo-First Order (PFO), Weber Morris (Intraparticle Diffusion Model) and Elovich models. The obtained constants were compared by tabulating. The constants for this model are 0.9953, 0.9934, 0.9986 for temperatures of 298, 308 and 318 K and type 6, and 0.9953, 0.9934, 0.9988 for type 8, respectively. As a result, when the regression coefficients were examined, it was determined that the nickel adsorption kinetics of this adsorbent was in good agreement with the PSO 6 and type 8 models and the adsorption was chemical in character.